Police officials stressed at the time that the man wasn't a suspect or a person of interest in the case. The man was seen in the area around the path where Vetrano was last seen that day and was spotted by a utility worker. Police said that the man could have seen Vetrano or her assailant.

Authorities have culled DNA from three different investigative points -- Vetrano's neck, her phone and her fingernails. Police say the fingernail DNA is the strongest, and all the samples point to the same person, though the state and local databases have yet to yield a possible match.